Grind

[Justin Bieber]

When an individual pushes his/herself to attain a goal.

Similar to gears grinding when they are worked beyond their capacity.

[Sonia]

Your hustle

Good work ethic, doing what you do.

Ex: Getting money, editing pix, singing...whatever your hustle is.
When youre on your grind then youre doing a good/great job at whatever youre doing.

[Justin Bieber]

1. When a drug dealer is running around town buying/selling drugs. Hey, I cant go right now, im on the grind.

2. A vulgar dance where people rub their body parts against each other. Usually to rap or techno. yo, check out that hoe over there putting her ass all up in that guys crotch...they are grinding.

[Britney]

A word used in any MMO representing the repetitive actions taken in order to make the character stronger. The grind is also a substitute for normal life functions. Sleeping, eating, drinking and being social are not important, when it comes to grinding.

[Hina Muqadas]

a dance that, for the male, doesnt require much skill and is almost pure confidence. Its kind of like going off of the high drive, very tempting but also kind of intimidating, but once done seems easier every time.

consists of a chick grinding her ass on a guys crotch

[Jessica]

A lesser known definition:

A form of musical composition when every instrument play repeatedly and rapidly, with unpredictable changes of stance in the beat.

[Ernesto]

When you [work] [your ass] off to [get shit done]

[Kai]

Your work-ethic...how [hard] you [work] in school, at [the job], etc...

[Becky]

Reduce (something) to small particles or powder by crushing it.

[Julian]

Grind in In-line skating. Occurs when a skater slides along a rail. The rail slots in between the wheels. Special street-style skates are required for this maneuver.